10... e8g8  11. a1c1  11... a7a5 Preparing Na6-b4 or maybe a5-a4. This highlights a small problem with the bishop on a3. 12. f3e1 Ding chooses an interesting plan, more or less typical of the English Opening, although it looks a bit funny: to play f2-f4 without moving any of the central pawns. 12... f8e8 